FPCN39 CWLW 061405
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 7:00 AM PDT MONDAY 6 OCTOBER 1997 FOR TODAY.

VENTILATION INDICES (TEMPERATURE) AND MIXING HEIGHTS.
MIXING HEIGHTS IN METRES ABOVE SEA LEVEL.
AVERAGE WINDS IN KNOTS.

SPOT INDICES ARE DETERMINED BY THE ASPECT AND ELEVATION OF THE SITES.
COMPARE WINDS, TEMPERATURES AND ELEVATION WITH THE SITES HERE
TO DETERMINE THE INDEX IN ANY OTHER AREA.

SOUTHERN INTERIOR

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
FRSR CANYN   KEL      15    9     500   2     76   13    1400  14
KAMLOOPS     KEL      13    9     550   2     77   14    2100   9
OKANAGAN     KEL      13    9     550   2     77   14    2100   9
CASTLEGAR    KEL      50   10    1500   5     71   14    2350   9
CRANBROOK    KEL      53    7    1950   9     60   12    2550   8
REVELSTOKE   KEL      11    8     550   2     73   11    1650   5

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PENTICTON    VR   5   W   15   W   26
CRANBROOK             VR   5   SW  15

           INVERSION HT    BREAKTHRU TEMP
KELOWNA          700 m          9 C
SPOKANE         NOT AVAILABLE

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: GOOD.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD.




CENTRAL INTERIOR/NORTHEAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
WILLIAMS L   P.G.     97    6    1950  16    100    9    3950  12
PR. GEORGE   P.G.      9    5     700   9     88    8    2600  12
SMITHERS     P.G.     11    4     600   2     92    8    2800   9
WELLS GRAY   P.G.    100    8    4000  17    100   10    3000  12
FT NLSN      F.N.      9    0     400  16     62    1    2600  10
FT STJOHN    F.N.     76    4    1700  10     70    7    2500  10

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
PR. GEORGE            W   22   W   37
SMITHERS              W   22   W   37

           INVERSION HT    BREAKTHRU TEMP
PR. GEORGE       800 m          9 C
FT. NELSON      1600 m          7 C

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: GOOD.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD BECOMING FAIR.




COAST

           UPPER      ***** MORNING ******    ***** AFTERNOON ****
             AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
                               (mASL)  (kt)            (mASL)  (kt)
VANCOUVER    QUIL     14   10     200   5     94   15    1750   9
FRASER VLY   QUIL     15   10     200   5     94   15    1700   9
SRN VRISL    QUIL     18   11     200   5     90   15    1600   9
CNTRL VRISL  QUIL     18   11     200   5     90   15    1650   9
NRN VRISL    HRDY     25   10     200   9    100   13    1300  14
TERRACE      ANT      10    6     250  10     85    9    1350  11
STEWART      ANT      51    8     700   8     67    9    1300   9

*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.

FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
             900m     1800m    2700m
VANCOUVER    W   20   W   30   W   37
PORT HARDY   W   20   W   30   NW  43
SANDSPIT     W   37   NW  43   NW  52

           INVERSION HT    BREAKTHRU TEMP
QUILLAYUTE       100 m         10 C
PORT HARDY      NO INVERSION
ANNETTE         NO INVERSION

TODAY'S VENTING: GOOD.

VENTING FOR TUESDAY: GOOD.

VENTING OUTLOOK WEDNESDAY THRU FRIDAY: GOOD.




VENTILATION GUIDELINES:
          0-33.....POOR
          34-54.....FAIR
          55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.


END/JMS